Vehicle Headlight Glare Shield Mode Control
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Solution Overview
Problem
Existing adaptive headlight systems fail to reliably switch to glare shield mode during passing maneuvers, leading to potential glare for drivers of other vehicles due to limitations in camera field of view and timing of mode activation/deactivation.
Innovation Solution
A method that uses a combination of camera image processing and sensor data from object detection devices to determine the relative position of vehicles, enabling precise timing of glare shield mode activation and deactivation to prevent glare, even when tail lamps exit or enter the camera's field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the glare shield mode is switched on as soon as a light source is identified in the camera image, then the driver of the further vehicle is protected from glare, but during passing maneuvers the tail lamps exit the field of view and the mode is incorrectly deactivated causing glare
Solution Approach 1:
The system performs preliminary action by determining the relative position of vehicles using object detection devices before the tail lamps exit the camera field of view. This allows the control device to anticipate when glare might occur and maintain the glare shield mode proactively, rather than reactively switching based solely on camera detection. The relative position data enables the system to take preventive action before the harmful condition (glare) occurs.
2Object-affected harmful factors
If the glare shield mode is deactivated with a time interval after light sources exit the camera field of view, then glare is prevented during passing, but the response time is delayed and energy is wasted maintaining unnecessary low beam
Solution Approach 1:
The system implements feedback by continuously monitoring the relative position of vehicles through object detection devices and using this information to dynamically adjust the glare shield mode. The control device receives feedback from both the camera (light source detection) and object detection devices (relative position), and switches the headlight mode based on this combined feedback. This eliminates the need for fixed time intervals and allows responsive, accurate mode switching that adapts to real-time driving conditions.
3Device complexity
If only camera image processing is used to detect light sources, then the system is simple, but it cannot reliably determine vehicle relative position during passing maneuvers when tail lamps are outside the field of view
Solution Approach 1:
The system merges multiple detection approaches by combining camera image processing with object detection device data. The control device integrates information from both the camera (which detects light sources within the field of view) and object detection devices (which provide relative position information). This combination allows the system to maintain simple camera-based operation when sufficient, while supplementing with object detection data during passing maneuvers when the camera alone cannot provide reliable position information.
Data Source
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AI summary
The invention relates to a method for operating a frontal headlight device (2) of a vehicle (1), in which an image of an environmental region (3) in direction of travel (18) in front of the vehicle (1) is captured by means of a camera (5) of the vehicle (1) and the headlight device (2) is switched to a glare shield mode by means of an electronic control device (6) of the vehicle (1) depending on whether a light source (22) of a further vehicle (20) is identified in the image, the further vehicle (20) is detected and a relative position of the further vehicle (20) is determined in direction of travel (18) relative to the vehicle (1) based on sensor data of at least one object detection device (8 to 17) disposed on the vehicle (1), wherein switching of the headlight device (2) to the glare shield mode is also performed considering the relative position of the vehicles (1, 20) in direction of travel (18) by means of the control device (6).